Special counsel Robert Mueller has offered to reduce the number of obstruction-related questions President Donald Trump would be asked by investigators, sources familiar with the negotiations tell CNN.

Although collusion is not listed as a federal crime, a person found collaborating with a foreign government could be charged with conspiracy, among other crimes. When the message gets lost and you're giving confusing and confounding answers, eventually the interviewers are just going to throw their hands up and say 'Alright, I have no idea what the hell this guy is talking about'. However, former FBI Chief of Staff Chuck Rosenberg pointed out yesterday on MSNBC, that collusion is " absolutely a crime".

The president has also used his Twitter to allege partisan bias among Mueller's investigative team, which he has dubbed the "13 angry Democrats". "Well, the president didn't hack!" "President Trump did nothing wrong", he wrote.

"The odds are against it, but I wouldn't be shocked, because he wants to do it", Giuliani said.

At a CNN town hall in April, former FBI Director James Comey, whom Trump fired, said collusion "is not actually a thing that exists under the federal laws of the United States". Waas said it also includes the February 15, 2017 White House memo outlining a timeline of the events that led up to Flynn's firing, as well as "underlying White House records quoted in the memo". He said Trump has done nothing to impede the investigation.

Former Trump lawyer Michael Cohen has said he'd be willing to go on the record with the special counsel and say the president did indeed know about the meeting. "Therefore, the witch hunt is an illegal scam", Mr Trump said.